The Balboa® Ultrazo3ne™ 34-59088-KIT Corona Discharge Ozonator Kit for Spas 120V/240V 150mg is a compact ozone generator with a smaller footprint that saves energy. Balboa's ozone generators are fully epoxy potted protecting them from harsh corroding environments. Once installed in your spa per manufacturer directions, this kit will allow you to produce a stable sanitizing ozone output over a wide range of temperatures.